In ΔXYZ, the measure of ∠Z=90°, ZY = 39, XZ = 80, and YX = 89. What ratio represents the cosecant of ∠Y?

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock